Nothing
getError=function(f,interval,type,delta,relative){
if (type=="lower")
{
if (relative){
error=abs((f-interval[1])/delta)*100
}else{
error=abs((f-interval[1]))
}
}
else
{ if (relative){
error=abs((f-interval[2])/delta)*100
}else{
error=abs((f-interval[2]))
}
}
return(error)
}
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